EP 2807343 A1 20141203 - ROTOR WITH FLATTENED EXIT PRESSURE PROFILE
Title (en)
ROTOR WITH FLATTENED EXIT PRESSURE PROFILE
Title (de)
ROTOR MIT ABGEFLACHTEM AUSGANGSDRUCKPROFIL
Title (fr)
ROTOR COMPORTANT UN PROFIL DE PRESSION DE SORTIE APLATI
Publication
Application
Priority
- US 201213357019 A 20120124
- US 2013021178 W 20130111
Abstract (en)
[origin: US2013189117A1] A rotor blade comprises an airfoil extending radially from a root section to a tip section and axially from a leading edge to a trailing edge, the leading and trailing edges defining a curvature therebetween. The curvature determines a relative exit angle at a relative span height between the root section and the tip section, based on an incident flow velocity at the leading edge of the airfoil and a rotational velocity at the relative span height. In operation of the rotor blade, the relative exit angle determines a substantially flat exit pressure ratio profile for relative span heights from 75% to 95%, wherein the exit pressure ratio profile is constant within a tolerance of 10% of a maximum value of the exit pressure ratio profile.
IPC 8 full level
F01D 5/14 (2006.01)
CPC (source: EP US)
F01D 5/141 (2013.01 - EP US); F05D 2240/30 (2013.01 - EP US); F05D 2240/301 (2013.01 - EP US); F05D 2240/304 (2013.01 - EP US); Y02T 50/60 (2013.01 - EP US)
Designated contracting state (EPC)
AL AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HR HU IE IS IT LI LT LU LV MC MK MT NL NO PL PT RO RS SE SI SK SM TR
DOCDB simple family (publication)
US 2013189117 A1 20130725; US 9017037 B2 20150428; EP 2807343 A1 20141203; EP 2807343 A4 20151007; SG 11201403867Q A 20140926; WO 2013112299 A1 20130801
DOCDB simple family (application)
US 201213357019 A 20120124; EP 13741350 A 20130111; SG 11201403867Q A 20130111; US 2013021178 W 20130111